This study was conducted to determine if the proposed Marysville Lake pumped-storage hydropower (900-MW) project could satisfy downstream water temperature objectives. A one-dimensional numerical model was used for simulation and prediction of temperatures within and downstream of Marysville Lake. A physical hydraulic model was used for study and description of the hydrodynamic response of the project to pumped-storage hydropower operations. The physical model, constructed to a distorted scale of 1:1600 horizontally and 1:160 vertically, simulated the dynamic, unsteady-state, density-stratified flows through Marysville Lake and the afterbay or reregulating pool. Information from the physical model was used to modify existing algorithms and to develop new ones for the mathematical model. The mathematical model allowed simulation of the heat exchange characteristics so the thermal regimes within and downstream of the lake could be determined for various hydrologic and meteorologic conditions and various pumped-storage hydropower operations. Results of the study indicate that the project should satisfy the temperature objectives desired downstream. (Author)
Description:
Technical rept. Aug 75-Oct 76
Pages:
86
Report Date:
APR 1977
Report Number:
A655240
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